Across
- 2. A lose collection of ice and dust that orbits the sun, typically in a long, narrow orbit.
- 4. neap tide. [nēp] A tide in which the difference between high and low tide is the least. Neap tides occur twice a month when the Sun and Moon are at right angles to the Earth. When this is the case, their total gravitational pull on the Earth's water is weakened because it comes from two different directions.
- 7. Either two days of the year on which the sun reaches its greatest distance north or south of the equator.
- 10. The path of an object that revolves around another object.
- 12. A crater chain is formed when an asteroid or comet with low tensile strength is pulled apart by tides during a close approach to a planet, separating into a train of fragments which hit a moon of the planet rather than escaping to interplanetary space.
- 15. The spinning motion of a planet on it's axis.
- 16. The attractive force between objects and the force that moves and objects; down hill.
- 18. The scientific law that states that every object in the universe attracts every other object.
- 19. English Language Learners Definition of tide. : the regular upward and downward movement of the level of the ocean that is caused by the pull of the Sun and the Moon on the Earth. : the flow of the ocean's water as the tide rises or falls. : the way in which something is changing or developing.
- 20. meteoroid. A meteoroid is a small space rock moving through a solar system. Space is full of meteoroids. Most meteoroids are small, the size of pebbles or dust from a comet's tail, but they can also be quite large. They're all chunks off of something bigger, sometimes even the moon or Mars
- 22. A multidimensional space in which each axis corresponds to one of the coordinates required to specify the state of a physical system, all the coordinates being thus represented so that a point in the space corresponds to a state of the system.
- 24. A system of organizing time that defines the beginning, length, and divisions of a year.
- 25. An imaginary line that passes through a planet's center and ti's north and south poles, about winch the planet rotates.
- 26. A ball of hot gas,primary hydrogen and helium undergoes nuclear fusion.
Down
- 1. AN object that orbits a star,is large enough to be rounded by its own gravity and has cleared the area of its orbit.
- 3. A speck of light in the sky produced by the burning of a meteoroid in the earths atmosphere.
- 5. Definition of penumbra. 1a : a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light. b : a shaded region surrounding the dark central portion of a sunspot.
- 6. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partially obscuring Earth's view of the Sun. ... Viewing the Sun during partial and annular eclipses (and during total eclipses outside the brief period of totality) requires special eye protection, or indirect viewing methods.
- 8. Either two days of the year on which neither hemisphere is tilted toward or away from the sun.
- 9. A pattern or grouping of stars that people imagine to represent a figure or object.
- 11. A tide of greater-than-average range around the times of new moon and full moon.
- 13. The movement of an object around another object.
- 14. Remember that an eclipse is when an object in space passes through a shadow. In a lunar eclipse, the light of the sun, which reflects on the moon, is being blocked by the Earth.
- 17. An object that orbits the planet.
- 21. The umbra (Latin for "shadow") is the innermost and darkest part of a shadow, where the light source is completely blocked by the occluding body. An observer in the umbra experiences a total eclipse.
- 23. The lunar maria /ˈmɑːriə/ (singular: mare /ˈmɑːreɪ/) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas.